Flexible Manhole Connection
Contact Us
- +86 15093100892
- inquiry@phtopindustry.com
- No.86 Jingsan Rd, Jinshui District, Zhengzhou City 45000, china
product category
Product Overview
Flexible Manhole Connection is an innovative connection solution designed for drainage pipe engineering. It is made of high-density polyethylene (HDPE) material and can effectively solve the leakage problem caused by traditional rigid connections. The system can adapt to pipe displacement through a unique flexible design to ensure long-term reliable sealing performance.


Flexible Manhole Connection Advantages
Excellent sealing performance: multiple sealing structure design, waterproof level reaches IP68 standard
Excellent flexibility: can withstand ±5° angle deviation and ±20mm axial displacement
Long-lasting durability: HDPE material is corrosion-resistant and has a service life of more than 50 years
Easy to install: standardized design, construction efficiency increased by more than 40%
Economic and environmentally friendly: low maintenance cost, materials can be 100% recycled
Technical parameters
| Item | Parameter |
| Material | PE100 or PE100RC grade HDPE |
| Applicable Diameter | DN110–DN1400 |
| Operating Temperature | -30°C to +60°C |
| Sealing Pressure | 0.5 MPa |
| Seismic Resistance | Can withstand magnitude 8 earthquake |
Flexible Manhole Connection structural features
Socket kit:
Reinforced rib design to improve structural strength
Built-in stainless steel retaining ring to ensure firm bonding with concrete
Special surface treatment to enhance bonding with concrete
Interface kit:
Multi-layer sealing design (rubber ring + water-expanding water stop strip)
Electrofusion connection area with temperature indicator strip
Anti-dislocation guide structure
Application areas
Municipal drainage network system
Pipeline connection of sewage treatment plant
Underground integrated pipe gallery
Industrial wastewater discharge system
Rainwater collection and utilization project
Key points for installing Flexible Manhole Connection
Buried socket kit before concrete pouring
Ensure that the connection parts are clean and dry
Electrofusion connection according to standard procedures
Air tightness test is required after installation
Pay attention to protecting the connection parts when backfilling
Quality assurance
The product complies with the requirements of GB/T 19472.2-2017 standard and provides 10-year quality assurance. We can also provide the following according to project requirements:
Special size customization service
Design of different pressure levels
Project site technical guidance
Professional installation training
Flexible Manhole Connection is gradually replacing traditional connection methods with its reliable performance and convenient installation features, and has become the preferred solution for modern drainage projects.
Manhole Connection Product Specification
| Pipe DN(mm) | SDR | D(mm) | L(mm) | L1(mm) | D1(mm) | D2(mm) | L2(mm) |
| 110 | 17 | 136 | 200 | 65 | 170 | 136 | 135 |
| 160 | 17 | 192 | 220 | 85 | 230 | 192 | 135 |
| 180 | 17 | 218 | 220 | 85 | 260 | 218 | 135 |
| 200 | 17 | 236 | 220 | 85 | 280 | 236 | 135 |
| 250 | 17 | 286 | 220 | 85 | 336 | 286 | 135 |
| 280 | 17 | 322 | 220 | 85 | 374 | 322 | 135 |
| 315 | 17 | 355 | 220 | 85 | 419 | 355 | 135 |
| 355 | 17 | 399 | 270 | 70 | 459 | 399 | 200 |
| 400 | 17 | 448 | 270 | 70 | 512 | 448 | 200 |
| 450 | 17 | 504 | 270 | 70 | 574 | 504 | 200 |
| 500 | 17 | 556 | 270 | 70 | 632 | 556 | 200 |
| 560 | 17 | 616 | 270 | 70 | 718 | 616 | 200 |
| 630 | 17 | 696 | 270 | 70 | 806 | 696 | 200 |
| 710 | 17 | 790 | 270 | 70 | 908 | 790 | 200 |
| 800 | 17 | 890 | 270 | 70 | 1018 | 890 | 200 |
| 900 | 17 | 992 | 270 | 70 | 1132 | 992 | 200 |
| 1000 | 17 | 1112 | 270 | 70 | 1262 | 1112 | 200 |
| 1200 | 17 | 1324 | 270 | 70 | 1496 | 1324 | 200 |
| 1400 | 17 | 1554 | 270 | 70 | 1750 | 1554 | 200 |


